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media: drivers/media/usb: fix memory leak in zr364xx_probe

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syzbot reported memory leak in zr364xx_probe()[1].
The problem was in invalid error handling order.
All error conditions rigth after v4l2_ctrl_handler_init()
must call v4l2_ctrl_handler_free().

Reported-by: syzbot+efe9aefc31ae1e6f7675@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Pavel Skripkin 2021-03-01 21:38:26 +01:00 committed by Mauro Carvalho Chehab
parent 18a4ca76ad
commit 9c39be40c0
1 changed files with 6 additions and 7 deletions
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13
drivers/media/usb/zr364xx/zr364xx.c
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@ -1430,7 +1430,7 @@ static int zr364xx_probe(struct usb_interface *intf,
if (hdl->error) {
err = hdl->error;
dev_err(&udev->dev, "couldn't register control\n");
goto unregister;
goto free_hdlr_and_unreg_dev;
}
/* save the init method used by this camera */
cam->method = id->driver_info;
@ -1503,7 +1503,7 @@ static int zr364xx_probe(struct usb_interface *intf,
if (!cam->read_endpoint) {
err = -ENOMEM;
dev_err(&intf->dev, "Could not find bulk-in endpoint\n");
goto unregister;
goto free_hdlr_and_unreg_dev;
}
/* v4l */
@ -1515,7 +1515,7 @@ static int zr364xx_probe(struct usb_interface *intf,
/* load zr364xx board specific */
err = zr364xx_board_init(cam);
if (err)
goto unregister;
goto free_hdlr_and_unreg_dev;
err = v4l2_ctrl_handler_setup(hdl);
if (err)
goto board_uninit;
@ -1533,7 +1533,7 @@ static int zr364xx_probe(struct usb_interface *intf,
err = video_register_device(&cam->vdev, VFL_TYPE_VIDEO, -1);
if (err) {
dev_err(&udev->dev, "video_register_device failed\n");
goto free_handler;
goto board_uninit;
}
cam->v4l2_dev.release = zr364xx_release;
@ -1541,11 +1541,10 @@ static int zr364xx_probe(struct usb_interface *intf,
video_device_node_name(&cam->vdev));
return 0;
free_handler:
v4l2_ctrl_handler_free(hdl);
board_uninit:
zr364xx_board_uninit(cam);
unregister:
free_hdlr_and_unreg_dev:
v4l2_ctrl_handler_free(hdl);
v4l2_device_unregister(&cam->v4l2_dev);
free_cam:
kfree(cam);